We are migrating to Office 365 for email and want to leave our website hosted at Dreamhost. The options under moving from Fully hosted to DNS Only has the comment. “DNS Only (Use DreamHost’s DNS servers, but host the site elsewhere.)”

We are using DreamHost’s DNS servers but want to keep our website hosted at Dreamhost. We only want to move our mail and add entries for mail and Lync to our DNS records.

We have a SSL certificate for our domain and have everything on the website working and do not want to break it (again)

When I switch from fully hosted to DNS only what should our DNS records look like to keep our website up and functioning on Dreamhost servers.